Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2f1a622d879e2639…

MALICIOUS

Office (OLE)

38.5 KB Created: 2009-10-26 15:20:00 Authoring application: Microsoft Word 11.5.5
MD5: b859db1d6339d03f957db24abc60e550 SHA-1: 66f52d5d3901bf212685b75ad0aa365a63ee8c5b SHA-256: 2f1a622d879e2639c7fbed92dbde4085241af858beacf36c85faf8bfec53c016
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening the document. The ClamAV detection 'Doc.Trojan.Thus-5' indicates a known malicious document type. The macro is likely designed to download and execute a second-stage payload, although the specific mechanism is not detailed in the provided evidence.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-5 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-5
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
4d6ffbf1ce6d9ebed42ab7a42f75864de3ec72838ccae692fcbd5aafa240f247		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2349 bytes
Detection
ClamAV: Doc.Trojan.Thus-5
Obfuscation or payload: unlikely

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